22501213 has 8 divisors (see below), whose sum is σ = 26100032. Its totient is φ = 18998496.

The previous prime is 22501211. The next prime is 22501223. The reversal of 22501213 is 31210522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22501213 - 2¹ = 22501211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22501211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23520 + ... + 24457.

It is an arithmetic number, because the mean of its divisors is an integer number (3262504).

Almost surely, 2^22501213 is an apocalyptic number.

It is an amenable number.

22501213 is a deficient number, since it is larger than the sum of its proper divisors (3598819).

22501213 is an equidigital number, since it uses as much as digits as its factorization.

22501213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48051.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 22501213 is about 4743.5443499561. The cubic root of 22501213 is about 282.3158818029.

Adding to 22501213 its reverse (31210522), we get a palindrome (53711735).

The spelling of 22501213 in words is "twenty-two million, five hundred one thousand, two hundred thirteen".